This course follows the Choice Collection Management Protocol: catalog it, photograph it, store it right, keep records your insurer and family can use, and review once a year.

Lesson 107.1: Handling, holders and humidity

Handle by the edges. For silver, use cotton gloves rather than latex, "because the sulphur in latex causes silver to tarnish" (CCI).
Skip PVC flips for long-term storage. NGC says PVC is fine only for "less than six months," after which it can lead to "hydrochloric acid which permanently scars the coin" (NGC).
Keep humidity low. For coins, the Canadian Conservation Institute says "Ideally, the RH should be below 30%," while "35–55% are the norm" for mixed collections. If corrosion starts, a silica-gel microclimate can help (CCI). Many collectors use indicator desiccant so they can see when it needs replacing (Collectors Universe forum).
Avoid wooden boxes and cabinets, especially oak. Wood "can emit acidic vapours… Oak cabinets in particular should be avoided" (CCI).
Keep things out of light and heat, and away from floors, attics and anywhere that floods.

Lesson 107.2: Photographing and cataloging

Everything else depends on a written inventory with photos: insurance claims, theft recovery, records for your tax pro, your heirs, and a fair sale. PCGS suggests keeping "a good high-resolution image of the front and back of your coin" (PCGS). Use our photo guide: front, back, label, edges, no flash glare. Record purchase price, date and seller in the private fields, and keep receipts.